CMI header ?
 

Can you back flush CMI elbow top headers? My elbows tops are getting way hotter than they should be. I got stuck up in some weeds and sucked up a lot of slimmy chit. I took the ends off my oil cooler off and it was packed with the green slimmy crap I got all that out and the headers are better but still not cool to the touch. So I am wondering what else can I do to get this slim out?